Double-layered covered stent for the treatment of malignant oesophageal obstructions: Systematic review and meta-analysis

Figure 1 PRISMA selection. Study selection process according to the PRISMA statement by the Cochrane Collaboration.

Figure 2 Technical success. A: Random effects forest plot of weighted pooled estimate; B: Respective funnel plot for bias assessment (the standard error of the proportion was plotted against the proportion for each study).

Figure 3 Complications. A: Random effects forest plot of weighted pooled estimate; B: Respective funnel plot for bias assessment (the standard error of the proportion was plotted against the proportion for each study).

Figure 4 Improvement of dysphagia score. A: Random effects forest plot of weighted pooled treatment effect; B: Respective funnel plot for bias assessment (the standard error of the score was plotted against the effect size for each study).

Figure 5 Stent migration. A: Random effects forest plot of weighted pooled estimate; B: Respective funnel plot for bias assessment (the standard error of the proportion was plotted against the proportion for each study).

Figure 6 Tumour overgrowth. A: Random effects forest plot of weighted pooled estimate; B: Respective funnel plot for bias assessment (the standard error of the proportion was plotted against the proportion for each study).